Any updates on this one? This is a really important feature for me since I often have to review refactorings with hundrets of files. (e.g. method signature has changed). These are actually minor changes but with many files being changed. Back in subversion I was just reading the revision's unified diff scrolling through the changes and checking whether greater refactorings have been made here and there. This was done in 5 minutes, now I review half an hour because I have to click through each and every file!
Setting up a command line diff tool for these operations is not an option for me. I need a one click solution without the need to reconfigure my client.